Medicine and Health Sciences Commons^™

Piercing Of The Lumbocostal Ligament By The Subcostal Nerve: A Previously Unreported Case., Marc Vetter, Joe Iwanaga, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

As lateral approaches gain popularity in lumbar spine surgery, detailed discussions regarding anatomical variations in the innervation of the thoracolumbar region are of increasing importance. Damage to intercostal or subcostal nerves can lead to post-operative complications including regional loss of sensitivity, motor function, or abdominal wall hernias. More specifically, the subcostal nerve has been identified in the literature as one of the more vulnerable structures during such procedures. A clear understanding of the position of the subcostal nerve relative to nearby anatomical structures is therefore important for medical professionals. We herein report a rare anatomical variation in which the subcostal …

Hematoma In The Bucco-Mandibular Space: First Case Report., Joe Iwanaga, Charlotte Wilson, Emre Yilmaz, Cameron K Schmidt, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

Our previous studies based on intraoral dissection of fresh cadavers revealed that the fissure and loose connective tissues deep to the mucosa between the incisivus labii inferioris muscle and buccinator muscle form the entrance of the newly discovered bucco-mandibular space. To support the clinical significance of this space, we report the finding of a hematoma within this space in an adult fresh cadaver. Such a finding lends credence to studying the bucco-mandibular space and might help better understand the spread of some infections in the oral region.

Cadaveric Study For Intraoral Needle Access To The Infratemporal Fossa: Application To Posterior Superior Alveolar Nerve Block Technique., Joe Iwanaga, Emily Simonds, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

The posterior superior alveolar (PSA) nerve block is, from an anatomical perspective, challenging because the mandibular ramus and the zygomatic process of the maxilla can interfere with the course of the needle. Dentists empirically know that shifting the patient's mandible to the ipsilateral side can improve visibility and accessibility for such blocks. This cadaveric study aimed to establish anatomical evidence for the ipsilateral mandible shifting used in the PSA. The distance between the lateral most bulging point of the alveolar part of the maxilla and ipsilateral anterior border of the ramus of the mandible ranged from 1.4 to 6.9 mm …

Variant Prevertebral Muscle: Unique Cadaveric Findings., Jocelyn R Gonzales, Joe Iwanaga, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

The levator scapulae muscle typically runs from the transverse process of the atlas to the superior angle of the scapula. In this paper, we describe a rare finding identified during a dissection of a male cadaver, wherein a continuation of the right levator scapulae ran past its normal attachment to the C1 transverse process, fusing with the inferior attachment of the rectus capitis lateralis muscle. No variants were found on the opposite side, and the innervation of the levator scapulae muscle variant was typical of that of a normal levator scapulae. We also describe other related variants of the cranial …

Clinical Anatomy Of The Frenulum Of The Oral Vestibule., Joe Iwanaga, Naoshi Takeuchi, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

Introduction The frenula of the oral vestibule include the labial and buccal frenula. Abnormal labial and buccal frenula can affect facial esthetics and oral cavity function by retracting the gingival margin, creating a median diastema, and limiting lip movement. Because of the lack of information on these structures, we aimed to clarify their anatomy. Methods A total of 34 sides from 17 fresh frozen cadaveric Caucasian heads were used in the present study. The specimens were derived from 11 male and 6 female adult cadavers. The relationships between the frenulum of the mucosa and the tissue underneath the mucosa was …

Hiding Within The Cracks: Case Report Of Rare Sutural Bone Found At The Nasion., Bryan Edwards, Joy Mh Wang, Joe Iwanaga, Jennifer Luviano, Marios Loukas, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

Pathology such as skull fractures can be misdiagnosed in the presence of anatomical variations. One variant that has had little description in the literature are the sutural bones associated with the nasal bones. Herein, we describe a case of a rare sutural bone at the nasion, between the bones of the right nasal, frontal, and maxillary frontal process. To our knowledge, this is the first report of such a variant bone in this location, and such it should be considered by clinicians when evaluating patients for pathology in this region.

The First Histological Analysis Of The Tissues Lining The Fossa Navicularis: Insights To Its Etiology., Sarvenaz Sheikh, Joe Iwanaga, Steven Rostad, Tarush Rustagi, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

The fossa navicularis (FN) is an anatomical variant on the ventral surface of the basilar part of the occipital bone that, to date, has only been investigated in bone specimens. We aim to clarify the structure of the fossa navicularis by gross anatomical, radiological, and histological methods. The FN was found in the occipital bone of the Caucasian male cadaver. There was no bony or histological continuity between the FN and posterior cranial fossa. The histological analysis found that the overlying tissue was composed of loose connective tissue with a mixture of collagen and elastic fibers and a vascular matrix …

Internal Hernia Of The Greater Omentum: Cadaveric Findings Of A Previously Unreported Variant., Andrea Andrea, Vy Tran, Cameron K Schmidt, Christian Fisahn, Joe Iwanaga, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

Transomental hernias (TOHs) are a rare finding, constituting a fraction of all intestinal hernias. Here, we report the cadaveric discovery of a spontaneous TOH involving the sigmoid colon in an 82-year-old female and discuss the relevant literature. To our knowledge, a TOH involving the sigmoid colon has not been previously reported.

Undetected Small Accessory Mental Foramina Using Cone-Beam Computed Tomography., Joe Iwanaga, Koichi Watanabe, Tsuyoshi Saga, Shogo Kikuta, Yoko Tabira, Sadaharu Kitashima, Christian Fisahn, Fernando Alonso, R Shane Tubbs, Jingo Kusukawa, Koh-Ichi Yamaki

Articles, Abstracts, and Reports

INTRODUCTION: The accessory foramina could not be identified on some imaging modalities such as surface-rendered images. The purpose of this study was to investigate the ability of surface-rendered images in detecting these foramina.

MATERIALS AND METHODS: We analyzed 20 accessory mental foramina (AMF) in nine mandibles removed from cadavers with cone-beam computed tomography (CBCT) and assessed in surface-rendered images. All AMF were divided into three groups depending on their visibility.

RESULTS: Group 1 included AMF that were clearly visible as foramina, Group 2 were not clearly visible but could be recognized with concave parts, and Group 3 were not visible …

Relationship Of The Median And Radial Nerves At The Elbow: Application To Avoiding Injury During Venipuncture Or Other Invasive Procedures Of The Cubital Fossa., Vlad Voin, Joe Iwanaga, Juan P Sardi, Christian Fisahn, Marios Loukas, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

INTRODUCTION: The median and radial nerves are two important neural structures found in the cubital fossa. The trajectory and landmarks used to identify their location are important when procedures are done in this area.

METHODS AND MATERIALS: Ten fresh-frozen cadavers were dissected (20 upper limbs) and measurements were taken from the medial epicondyle to the median and radial nerves as well as to the lateral epicondyle of each limb.

RESULTS: The distance between the medial epicondyle and the median nerve was found to be three centimeters with a range of 2.1 to four centimeters and the distance from the medial …

Giant Arachnoid Granulation Associated With Anomalous Draining Vein: A Case Report., Randle Umeh, Rod J Oskouian, Marios Loukas, R Shane Tubbs

Articles, Abstracts, and Reports

Giant arachnoid granulations (AG) can mimic intracranial lesions. Knowledge of these structures can help avoid misdiagnosis when interpreting imaging. Here, we report a child who presented with a mass within the superior sagittal sinus and an anomalous draining vein. Herein, the diagnosis of a giant AG was made. Clinicians who view or interpret imaging of the head should be aware of these anatomical variants and though when very large, apparently, do not necessarily result in pathology. Based on our case report, giant AG might also demonstrate anomalous draining veins.

The Dens: A Review Of Its Diverse Nomenclature And A Recommended Simplified Terminology., Jaspreet Johal, Christian Fisahn, Brittni Burgess, Marios Loukas, Jens Chapman, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

Pathology of the dens, such as fractures, demands precise terminology so that communication between physicians are succinct, diagnoses are accurate, and treatment strategies exact. This review aims to summarize the various terms used to describe the parts of the dens and recommend the ideal terminology. Using standard search engines, English language publications were searched for the many terms used to describe parts of the dens. A multitude of terms was identified with many demonstrating overlaps. Terms identified included apex, tip, apicodental, subdental, dentocentral and odontocentral junctions, peg, waist, base, neck, shaft, shoulder, and stem. Exact terminology is necessary when diagnosing …

A Previously Unreported Arterial Variant Of The Suboccipital Region Based On Cadaveric Dissection., Christian Fisahn, Brittni Burgess, Joe Iwanaga, Fernando Alonso, Jens R Chapman, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

No abstract provided.